CN219333045U - Low-temperature extinguishing agent injection device, extinguishing device and fire-fighting unmanned aerial vehicle - Google Patents

Abstract

The embodiment of the application discloses low temperature fire extinguishing agent injection apparatus, extinguishing device and fire control unmanned aerial vehicle thereof, low temperature fire extinguishing agent injection apparatus is including liquid air tank, dry powder jar, blender and the injection pipe that are connected. According to the method, the liquid air tank, the dry powder tank and the mixer are arranged, so that the liquid air and the dry powder extinguishing agent are fully mixed, the high-pressure low-temperature extinguishing agent is further formed, the low-temperature extinguishing agent is driven to be ejected by high pressure generated by vaporization of the liquid air, the ejection power is strong, and the extinguishing effect is good; simultaneously, through setting up scalable and/or angularly adjustable injection pipe, effectively promote fire control unmanned aerial vehicle's fire extinguishing performance, satisfy the high altitude demand of putting out a fire.

Description

Low-temperature extinguishing agent injection device, extinguishing device and fire-fighting unmanned aerial vehicle

Technical Field

The embodiment of the application relates to the technical field of fire control, in particular to a low-temperature extinguishing agent spraying device, a fire extinguishing device and a fire-fighting unmanned aerial vehicle thereof.

Background

With the continuous development of economy and society, high-rise buildings are more and more, and the number of high-rise buildings with the height of more than 200m is increased in two-line cities. With the building of high-rise buildings, the problem of fire control and extinguishment of high-rise buildings is also more and more prominent. The fire-extinguishing height of the existing fire-fighting truck can only reach within 120 meters, and if the fire-fighting truck is higher, the fire-fighting truck can not reach the corresponding height, so that the fire-extinguishing of a high-rise becomes a troublesome problem. In addition, high-rise buildings are often located in urban centers, and the elbows of urban road resources seriously affect the fire-fighting response time.

In recent years, with the development of unmanned technology, attempts have been made to apply unmanned aerial vehicles to the field of fire protection. The fire-fighting unmanned aerial vehicle that exists on the market at present is small-size fire-fighting unmanned aerial vehicle in most cases, and the extinguishing device who carries is traditional conventional dry powder fire-extinguishing tank, and fire extinguishing ability is limited, can't better satisfy the demand of putting out a fire.

Disclosure of Invention

The embodiment of the application provides a low temperature fire extinguishing agent injection apparatus, extinguishing device and fire control unmanned aerial vehicle thereof, can form high pressure low temperature fire extinguishing agent, effectively promotes fire control unmanned aerial vehicle's fire extinguishing performance, satisfies the high altitude demand of putting out a fire.

In a first aspect, the embodiments of the present application disclose a low temperature fire extinguishing agent injection apparatus, be applied to fire control unmanned aerial vehicle mounted's extinguishing device, include:

a liquid air tank provided with a liquid air accommodating chamber;

a dry powder tank provided with a dry powder accommodating cavity;

the mixer is provided with a mixing cavity with an inlet communicated with the liquid air accommodating cavity and the dry powder accommodating cavity; and

and the injection pipe is communicated with the outlet of the mixing cavity.

In some possible embodiments, a first stop solenoid valve is provided between the liquid air tank and the mixer; and/or a second stop electromagnetic valve is arranged between the dry powder tank and the mixer; and/or a third stop electromagnetic valve is arranged between the mixer and the injection pipe.

In some possible embodiments, the cryogenic fire suppression agent injection device further comprises an injection control board, and the first, second and/or third stop-current valves are connected to the injection control board.

In some possible embodiments, the injection tube is provided with a telescopic mechanism connected to the injection control plate.

In some possible embodiments, the injection tube comprises at least two sleeves that are nested with each other, and the telescopic mechanism comprises a telescopic drive assembly that can drive the respective sleeves to extend or retract.

In some possible embodiments, the liquid air tank, the dry powder tank and the mixer are connected by a pipeline.

In some possible embodiments, the tubing comprises: a first branch and a second branch; the first end of the first branch is communicated with the liquid air tank, and the second end of the first branch is communicated with the mixer; the first end of the second branch is communicated with the dry powder tank, and the second end of the second branch is communicated with the mixer.

In some possible embodiments, the tubing further comprises a third branch; the second end of the first branch and the second end of the second branch are both communicated with the first end of the third branch, and the second end of the third branch is communicated with the mixer.

In some possible embodiments, the pipeline further comprises a fourth branch, which communicates the mixer with the injection pipe.

In a second aspect, embodiments of the present application disclose a fire extinguishing apparatus comprising: a cryogenic fire suppression agent spray device as claimed in any one of the preceding claims.

In a third aspect, embodiments of the present application disclose a fire-fighting unmanned aerial vehicle, comprising:

an unmanned aerial vehicle main body; and

the fire extinguishing device is hung on the unmanned aerial vehicle main body; the fire extinguishing apparatus comprises a cryogenic fire extinguishing agent spraying apparatus as claimed in any preceding claim.

In some possible embodiments, the cryogenic fire suppression agent injection device further comprises a tank mount to which the liquid air tank and/or dry powder tank is secured.

In some possible embodiments, the tank mounting seat is provided with a tank mounting cavity in the up-down or left-right direction, and the liquid air tank and/or the dry powder tank is fixed in the tank mounting cavity of the tank mounting seat.

In some possible embodiments, the cryogenic fire suppression agent injection device is secured to the bottom of the unmanned aerial vehicle body.

In some possible embodiments, the bottom of the unmanned aerial vehicle body is provided with a mount, and the top end of the tank mount is fixed on the mount.

In some possible embodiments, the bottom of the unmanned aerial vehicle body has two landing gears arranged at intervals, and the cryogenic fire extinguishing agent spraying device is located between the two landing gears.

In some possible embodiments, the liquid air tank and/or the dry powder tank are mounted on the unmanned aerial vehicle body by quick release fasteners.

The beneficial effects of this application are:

according to the embodiment of the application, the liquid air tank for containing the highly compressed liquid air and the dry powder tank for containing the dry powder extinguishing agent are arranged, and the mixer is arranged, so that the liquid air and the dry powder extinguishing agent are fully mixed, the low temperature of the liquid air is utilized to form the low temperature extinguishing agent, and the extinguishing performance is better; meanwhile, the high pressure generated by liquid air vaporization is utilized, and the low-temperature extinguishing agent can be directly driven to be ejected without additionally arranging an extinguishing agent emitting device, so that the ejection power is strong; simultaneously, through setting up scalable and/or angularly adjustable injection pipe, effectively promote fire control unmanned aerial vehicle's fire extinguishing performance, satisfy the high altitude demand of putting out a fire.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without the need for inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing a structure of a first embodiment of the low-temperature extinguishing agent discharging device according to the present application in a conventional state.

Fig. 2 is a schematic view showing a structure of the fire extinguishing agent discharging device according to the first embodiment of the present application in a state in which a discharge pipe is extended.

Fig. 3 is a schematic view of the structure of the second embodiment of the low-temperature extinguishing agent discharging device according to the present application in a conventional state.

Fig. 4 is a schematic structural view of a second embodiment of the low-temperature extinguishing agent spraying device according to the present application, in which the spraying pipe is extended to a set length and rotated to a set angle.

Fig. 5 is a control schematic diagram of the low-temperature extinguishing agent discharging device according to the embodiment of the present application.

Fig. 6 is a schematic structural diagram of the fire-fighting unmanned aerial vehicle according to the embodiment of the present application in a normal state.

Fig. 7 is a schematic structural view of the fire-fighting unmanned aerial vehicle according to the embodiment of the present application in a state in which the injection pipe is extended.

Fig. 8 is a schematic structural view of the fire-fighting unmanned aerial vehicle according to the embodiment of the present application in a state in which the injection pipe extends to a set length and rotates to a set angle.

Reference numerals:

10-an unmanned aerial vehicle body; 11-landing gear;

20-a low-temperature extinguishing agent spraying device; 21-a liquid air tank; 22-a dry powder tank; 23-a mixer; 24-jet pipe; 241-first sleeve; 242-a second sleeve; 251-a first stop solenoid valve; 252-a second stop solenoid valve; 253-third stop solenoid valve; 26-spraying control panel; 271-a telescoping mechanism; 272-an angle adjustment mechanism; 28-pipeline; 281-a first leg; 282-second leg; 283-third leg; 291-tank mount; 292-support frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail by way of embodiments with reference to the accompanying drawings in the examples of the present application. Obviously, embodiments and features of embodiments in this application may be combined with each other without conflict.

It should be noted that: in the drawings, like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functions; in the description of the present application, the terms "center," "longitudinal," "transverse," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the scope of protection of the present application; in the description of the present application, "first", "second", etc. are used merely for distinguishing one from another, and do not denote their importance or order or the like.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, movably connected, or detachably connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, can be communicated with the inside of two elements, and the like. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Referring to fig. 1-4, an embodiment of the present application provides a low-temperature fire extinguishing agent spraying device 20, which is applied to a fire extinguishing device mounted on a fire-fighting unmanned aerial vehicle, wherein the low-temperature fire extinguishing agent spraying device 20 comprises a liquid air tank 21, a dry powder tank 22, a mixer 23 and a spraying pipe 24 which are communicated. The ejector tube 24 is provided with.

Specifically, the liquid air tank 21 is provided with a liquid air accommodating chamber for accommodating highly compressed liquid air. In some embodiments, the liquid air in the liquid air tank 21 is pre-stored and can be added again, i.e. when the liquid air in the liquid air tank 21 is used up, a new liquid air tank 21 storing liquid air is replaced or new liquid air is re-introduced into the original liquid air tank 21.

The dry powder tank 22 is provided with a dry powder receiving cavity for receiving a dry powder extinguishing agent. As a preferred embodiment, the dry powder extinguishing agent is an ultrafine dry powder extinguishing agent. In some embodiments, the dry powder agent in the dry powder tank 22 is pre-stored and re-added, i.e., when the dry powder agent in the dry powder tank 22 is used up, the dry powder tank 22 storing the dry powder agent is replaced with a new one or the dry powder agent is re-introduced into the original dry powder tank 22.

The liquid air in the liquid air tank 21 and the dry powder extinguishing agent in the dry powder tank 22 are pre-stored and can be added again, so that the recycling of the liquid air tank 21 and the dry powder tank 22 can be realized; when the same fire-fighting unmanned aerial vehicle needs to be reused in emergency of fire, corresponding raw materials can be directly added into the tank without disassembling and replacing the tank body, so that time is effectively saved, and the fire extinguishing efficiency is improved. Meanwhile, the reusable liquid air tank 21 and the dry powder tank 22 are more energy-saving and environment-friendly. It will be appreciated that in practice, the replenishment of the cryogenic fire suppression agent feed stock may also be accomplished directly by replacing the liquid air tank 21 and/or dry powder tank 22.

The mixer 23 is provided with a mixing chamber for mixing the liquid air with the dry powder extinguishing agent to form a low temperature extinguishing agent. Specifically, the mixing cavity is provided with an inlet and an outlet which are communicated, the liquid air accommodating cavity and the dry powder accommodating cavity are communicated with the inlet of the mixing cavity, the liquid air and the dry powder extinguishing agent are controlled to enter the mixing cavity through the inlet of the mixing cavity, so that the liquid air and the dry powder extinguishing agent are fully mixed in the mixing cavity to form the low-temperature extinguishing agent, and the low-temperature extinguishing agent is sent out through the outlet of the mixing cavity when needed.

The spraying pipe 24 is communicated with the outlet of the mixing cavity and is used for spraying the low-temperature fire extinguishing agent formed by mixing.

In some possible embodiments, a first stop solenoid valve 251 is provided between the liquid air tank 21 and the mixer 23; and/or a second stop electromagnetic valve 252 is arranged between the dry powder tank 22 and the mixer 23; and/or a third stop solenoid valve 253 is provided between the mixer 23 and the injection pipe 24. As a preferred embodiment, the liquid air tank 21, the dry powder tank 22 and the mixer 23, and the mixer 23 and the injection pipe 24 are respectively controlled to be opened or closed by a first stop electromagnetic valve 251, a second stop electromagnetic valve 252 and a third stop electromagnetic valve 253. In a normal state, the first stop solenoid valve 251, the second stop solenoid valve 252 and the third stop solenoid valve 253 are all normally closed.

In some possible embodiments, the low-temperature fire extinguishing agent spraying device 20 further includes a spraying control board 26, the first stopping electromagnetic valve 251, the second stopping electromagnetic valve 252 and the third stopping electromagnetic valve 253 are all connected with the spraying control board 26, and the spraying control board 26 controls the on-off of the first stopping electromagnetic valve 251, the second stopping electromagnetic valve 252 and the third stopping electromagnetic valve 253.

In some embodiments of the present application, only one of the injection pipes 24 may be provided; in other embodiments of the present application, the injection tube 24 may be provided in plurality.

In some possible embodiments, the injection tube 24 is provided with a telescopic mechanism 271 and/or an angle adjustment mechanism 272. The telescopic mechanism 271 and/or the angle adjusting mechanism 272 are connected to the spray control plate 26.

Specifically, in some possible embodiments, the injection tube 24 comprises at least two sleeves that are nested with each other, and the telescoping mechanism 271 comprises a telescoping drive assembly that can drive the respective sleeves to extend or retract. In the embodiment shown in fig. 2 and 4, the injection tube 24 includes a first sleeve 241 and a second sleeve 242 that are sleeved with each other, the outer diameter of the first sleeve 241 is matched with the inner diameter of the second sleeve 242, the first sleeve 241 is sleeved in the second sleeve 242, and the end of the first sleeve 241 far from the mixer 23 can be extended or retracted relative to the second sleeve 242. The telescopic driving assembly is connected with the injection control board 26 to control the first sleeve 241 to extend or retract in the second sleeve 242 according to a set length when receiving a telescopic command of the injection control board 26, so that the injection port of the injection pipe 24 can be aligned with a target fire source in a short distance. In the specific implementation, the telescopic driving assembly can be any driving structure capable of realizing reciprocating motion between the sleeves, such as a cylinder driving structure, a gear driving structure, a guide rail driving structure and the like. It will be appreciated that, as another example, the inner diameter of the first sleeve 241 may be matched with the outer diameter of the second sleeve 242, so that the first sleeve 241 is sleeved on the outer portion of the second sleeve 242, and the first sleeve 241 is extended or retracted on the outer portion of the second sleeve 242. As yet another embodiment of the present application, the number of the sleeves may be set to three or more, and the telescopic manner of a plurality of the sleeves may be the same as or similar to that of the above-described embodiment.

In other possible embodiments, the ejector tube 24 is a telescopic tube with an extendable or contractible tube body, and the telescopic mechanism 271 includes a telescopic driving assembly that can drive the extension or contraction of the tube body of the ejector tube 24. Specifically, the pipe body of the injection pipe 24 adopts a telescopic structure, or the pipe body of the injection pipe 24 adopts a telescopic material. The telescopic driving assembly may be any structure capable of driving the pipe body of the injection pipe 24 to extend or shorten, such as a cylinder driving structure, a gear driving structure, a guide rail driving structure, etc.

In some possible embodiments, the angle adjustment mechanism 272 includes a universal adjustment assembly that can drive the spray tube 24 to rotate a set angle. The angle adjusting mechanism 272 is connected with the injection control board 26 to control the injection pipe 24 to rotate by a set angle when receiving the angle adjusting instruction of the injection control board 26, so that the injection port of the injection pipe 24 can be aligned with the target fire source in real time.

The spray pipe 24 is provided with an extensible or contractible structure, intelligent control is realized through the spray control board 26, and the distance between the spray opening of the spray pipe 24 and a target fire source can be controlled in real time according to fire extinguishing demands during use, so that the fire extinguishing efficiency is higher, and the effect is better. Meanwhile, by setting the angle adjusting mechanism 272, intelligent control is realized through the jet control board 26, the angle of the fire-fighting unmanned aerial vehicle is not required to be adjusted, the jet pipe 24 can be controlled to rotate by a set angle according to the scene fire condition in real time, and the fire-fighting unmanned aerial vehicle is immediately aimed at a target fire source, so that manual fire extinguishing is fully simulated, comprehensive fire extinguishing operation is performed more pertinently, and the fire-fighting unmanned aerial vehicle is more intelligent, more efficient and better in fire extinguishing effect.

With continued reference to fig. 1-4, in some possible embodiments, the liquid air tank 21, the dry powder tank 22, and the mixer 23 are connected by a line 28. As a preferred embodiment, sealing rings are provided at each connection joint of the pipeline 28.

In one embodiment, as shown in fig. 3 and 4, the pipeline 28 specifically includes a first branch 281 and a second branch 282. A first end of the first branch 281 communicates with the liquid air tank 21, and a second end of the first branch 281 communicates with the mixer 23; the first end of the second branch 282 is communicated with the dry powder tank 22, and the second end of the second branch 282 is communicated with the mixer 23.

In another embodiment, as shown in fig. 1 and 2, the pipeline 28 further includes a third branch 283. In this embodiment, the first end of the first branch 281 is connected to the liquid air tank 21, the first end of the second branch 282 is connected to the dry powder tank 22, the second end of the first branch 281 and the second end of the second branch 282 are both connected to the first end of the third branch 283, and the second end of the third branch 283 is connected to the mixer 23.

In some of these embodiments, the conduit 28 may further comprise a fourth branch, which communicates the mixer 23 with the injection pipe 24. In other of these embodiments, the injection pipe 24 communicates directly with the mixer 23 without further provision of a fourth branch.

In a specific implementation, the capacities of the liquid air tank 21, the dry powder tank 22 and the mixing chamber, the length and thickness of each pipeline in the pipeline 28, the length and thickness of the spraying pipe 24, the spraying amount and spraying rate of the low-temperature fire extinguishing agent and the like can be reasonably configured according to the load design and actual fire extinguishing requirements of the fire-fighting unmanned aerial vehicle.

Based on this, this application still provides a fire extinguishing device, is applied to fire control unmanned aerial vehicle. The fire extinguishing apparatus includes a cryogenic fire extinguishing agent spraying apparatus 20 provided in an embodiment of the present application.

Based on this, this application still provides a fire control unmanned aerial vehicle simultaneously, fire control unmanned aerial vehicle includes unmanned aerial vehicle main part 10 to and extinguishing device, extinguishing device is hung on unmanned aerial vehicle main part 10. The fire extinguishing apparatus includes a cryogenic fire extinguishing agent spraying apparatus 20 provided in an embodiment of the present application.

In some possible embodiments, the cryogenic fire suppression agent spray device 20 further comprises a tank mount 291, and the liquid air tank 21 and/or dry powder tank 22 are secured to the tank mount 291. Referring to fig. 6-8, as a preferred embodiment, the tank mounting seat 291 is longitudinally provided with two tank mounting cavities in the up-down direction, and the liquid air tank 21 and the dry powder tank 22 are fixed in the tank mounting cavities of the tank mounting seat 291. The two tank body mounting cavities are longitudinally arranged in the vertical direction, so that the liquid air tank 21 and the dry powder tank 22 are conveniently mounted, and balance control in the flight of the fire-fighting unmanned aerial vehicle is facilitated. Of course, in other possible embodiments, two tank installation cavities may be laterally arranged in the left-right direction. As a preferred embodiment, the outer contours of the liquid air tank 21 and the dry powder tank 22 are the same, and the inner contours of the two tank body installation cavities are the same

In some possible embodiments, the cryogenic fire suppression agent spray device 20 is fixed to the bottom of the unmanned aerial vehicle body 10.

In some possible embodiments, the bottom of the unmanned aerial vehicle body 10 is provided with a mount, and the top end of the can mount 291 is fixed to the mount.

In some possible embodiments, the bottom of the unmanned aerial vehicle body 10 has two landing gears 11 disposed at intervals, and the cryogenic fire extinguishing agent spraying device 20 is located between the two landing gears 11. In some possible embodiments, the tank mount 291 may also be secured to the landing gear 11 by a support bracket 292.

In some possible embodiments, the liquid air tank 21 and/or the dry powder tank 22 are mounted on the unmanned aerial vehicle body 10 by quick release snap-in fasteners. As a preferred embodiment of the present application, the liquid air tank 21 and/or the dry powder tank 22 are fixed to the tank body mounting seat 291 by quick-release fasteners. By fixing the liquid air tank 21 and/or the dry powder tank 22 by means of quick release fasteners, quick installation and replacement of the liquid air tank 21 and/or the dry powder tank 22 is facilitated.

The unmanned aerial vehicle main body 10 is provided with a device power supply, and the low-temperature fire extinguishing agent spraying device 20 is powered by the device power supply.

The unmanned aerial vehicle body 10 is also provided with a control system. The fire extinguishing device is communicated with the control system through the CAN bus. In this embodiment, the injection control board 26 is connected to a control system to receive instructions from the control system. In other embodiments, the cryogenic fire suppression agent spray device 20 may not be provided with a separate spray control board 26, but rather the associated electronics may be controlled directly by the control system.

In some possible embodiments, the unmanned aerial vehicle body 10 is further provided with a millimeter wave radar to ground, and the millimeter wave radar to ground is mounted on the bottom of the tank mount 291.

Hereinafter, a specific application of one embodiment of the low-temperature extinguishing agent discharging device 20, the fire extinguishing device, and the fire fighting unmanned aerial vehicle of the present application will be described in further detail.

The fire-fighting unmanned aerial vehicle and the ground station are matched and provided with a communication module, and the control system and the ground station conduct data interaction through the communication module.

When the fire extinguishing operation needs to be executed, the ground station issues a fire extinguishing operation instruction to the control system of the fire-fighting unmanned aerial vehicle. When the control system receives a fire extinguishing operation instruction, the control system controls the equipment power supply to supply power to the low-temperature fire extinguishing agent spraying device 20 and issues an instruction, and the spraying control board 26 is triggered; the jet control plate 26 controls the jet pipe 24 to extend and retract to a proper length and rotate to a proper angle; meanwhile, the spray control board 26 controls the first stop electromagnetic valve 251 to open and release liquid air, controls the second stop electromagnetic valve 252 to open and release dry powder extinguishing agent, and the liquid air and the dry powder extinguishing agent enter the mixer 23 through the pipeline 28 to form low-temperature extinguishing agent; the injection control board 26 controls the third stop electromagnetic valve 253 to be opened, the low-temperature fire extinguishing agent obtains power through the high pressure of the vaporization of the liquid air, and the low-temperature fire extinguishing agent is injected along the injection pipe 24 to perform comprehensive fire extinguishing.

Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will appreciate that the present application is not limited to the particular embodiments described herein, but is capable of numerous obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the present application. Therefore, while the present application has been described in connection with the above embodiments, the present application is not limited to the above embodiments, but may include many other equivalent embodiments without departing from the spirit of the present application, the scope of which is defined by the scope of the appended claims.

Claims (17)

1. The utility model provides a low temperature fire extinguishing agent injection apparatus, is applied to fire control unmanned aerial vehicle mounted's extinguishing device, its characterized in that includes:

a liquid air tank provided with a liquid air accommodating chamber;

a dry powder tank provided with a dry powder accommodating cavity;

the mixer is provided with a mixing cavity with an inlet communicated with the liquid air accommodating cavity and the dry powder accommodating cavity; and

and the injection pipe is communicated with the outlet of the mixing cavity.

2. The cryogenic fire suppression agent spray device of claim 1, wherein a first check valve is disposed between the liquid air tank and the mixer; and/or a second stop electromagnetic valve is arranged between the dry powder tank and the mixer; and/or a third stop electromagnetic valve is arranged between the mixer and the injection pipe.

3. The low-temperature extinguishing agent spraying device according to claim 2, further comprising a spraying control board, wherein the first, second and/or third stop solenoid valves are connected to the spraying control board.

4. A cryogenic fire suppression agent spray device as recited in claim 3 wherein said spray tube is provided with a telescoping mechanism connected to said spray control panel.

5. The cryogenic fire suppression agent spray device of claim 4, wherein the spray tube comprises at least two sleeves that are nested with one another, and the telescoping mechanism comprises a telescoping drive assembly that can drive the extension or retraction of the respective sleeves.

6. The cryogenic fire suppression agent spray device of any one of claims 1-5, wherein the liquid air tank, dry powder tank and mixer are connected by piping.

7. The cryogenic fire suppression agent spray device of claim 6, wherein the conduit comprises: a first branch and a second branch; the first end of the first branch is communicated with the liquid air tank, and the second end of the first branch is communicated with the mixer; the first end of the second branch is communicated with the dry powder tank, and the second end of the second branch is communicated with the mixer.

8. The cryogenic fire suppression agent spray device of claim 7, wherein the conduit further comprises a third branch; the second end of the first branch and the second end of the second branch are both communicated with the first end of the third branch, and the second end of the third branch is communicated with the mixer.

9. The cryogenic fire suppression agent injection device of claim 8, wherein the conduit further comprises a fourth branch that communicates the mixer with the injection tube.

10. Fire extinguishing device is applied to fire control unmanned aerial vehicle, a serial communication port includes: a cryogenic fire-extinguishing agent spraying device as claimed in any one of claims 1 to 9.

11. A fire unmanned aerial vehicle, comprising:

an unmanned aerial vehicle main body; and

the fire extinguishing device is hung on the unmanned aerial vehicle main body; the fire extinguishing apparatus comprising the cryogenic fire extinguishing agent spraying apparatus of any one of claims 1 to 9.

12. The fire fighting unmanned aerial vehicle of claim 11, wherein the cryogenic fire suppression agent injection device further comprises a tank mount, the liquid air tank and/or dry powder tank being secured to the tank mount.

13. The fire unmanned aerial vehicle of claim 12, wherein the tank mount is provided with a tank mount cavity in an up-down or left-right direction, and the liquid air tank and/or the dry powder tank is secured within the tank mount cavity of the tank mount.

14. The fire fighting unmanned aerial vehicle of claim 13, wherein the cryogenic fire suppression agent injection device is secured to the bottom of the unmanned aerial vehicle body.

15. The fire fighting unmanned aerial vehicle of claim 14, wherein a mounting member is provided at the bottom of the unmanned aerial vehicle body, and the top end of the tank mounting seat is fixed to the mounting member.

16. The fire fighting unmanned aerial vehicle of claim 15, wherein the bottom of the unmanned aerial vehicle body has two landing gears disposed at intervals, and the cryogenic fire suppression agent injection device is located between the two landing gears.

17. The fire fighting unmanned aerial vehicle of any of claims 11-16, wherein the liquid air tank and/or dry powder tank is mounted on the unmanned aerial vehicle body by a quick release buckle.

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